found this on 3rd gen with a search .
This Motown intake is a very nice, high quality casting and a steal at $180.
Comparing the Motown intake and Edelbrock rails, the center to center for #1 to #3 and #5 to #7 are perfect. The center to center from #3 to #5 is off a little over 1/16”, but there’s more than enough wiggle room with the o-rings that the injectors fit without issue. If I hadn’t measured them I'm certain I wouldn’t have known there was any difference at all - they were no harder to seat than others I've installed.
Also worth noting is the Edelbrock signature on the rails is only on one side, so you can run them with the plain side out if you want.
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